Crusher.



A. IEDERMEYER & R. BERNHARD.

GBUSHER.

APPLICATION FILED AUG. 2, 1909. l 969,232. PatentedMay 31, 1910 2 SHEETS-SHEET l. W1.

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A. NIEDERMBYER & R. BERNHARD.

CRUSHER.

APPLIUATION FILED AUG. z, 1909.

2 SHEETS-SHEET 2.

AR'HUR NIEDERMEYER AND RICHARD BERNHARD, OF MILWAUKEE, WISCONSIN,

ASSIGNORS TO POWER AND MINING MACHINERY COMPANY, A CORPORATION OF NEW JERSEY.

emisrirna.l

Specicaton of Letters Patent.

Patented may 3i, raie.

Application led August 2, 1909. vSerial Noi 510,689.

scribed and represented in the following l`specification and the accompanying drawings, forming a part of the same.

This invention relates to that class of gyratory Crushers employing a shaft carrying the crushing head and operated by driving mechanism below the head, the especial object of the invention being to provide a more compact, lighter, and stronger machine of this class.

AIn accordance with the present invention,"

that portion of the machine below the crushing head is shortened by locating the eccentric and eccentric hub) directly below the crushing head and providing space around Bthe eccentric hub and chamber that incloses and protects the driving mechanism, between the chamber and thecasing, for the delivery of the crushed dmaterial `around the driving mechanism toa discharge chute below the mechanism. The space below the head which is. usually occupied by the diaphragm is utilized for the eccentric, andthe crushing shaft and portion of the crusher'fbelow'the crushing head thus may be made much shorter, while the construction is simple, strong and convenient of manufacture. The space above the eccentric is vpreferably closed by a ring forming a dust rexcluding device, which ring preferably has aspherical or conical seat on top of thel eccentric hub, the spherical'seat being struck from a center at the fulcrum p oint of the shaft inA the spider, so as to prevent vertical rubbing action or tipping ofthe kring as the head gyrates.v

For a full understanding of the invention,

a detailed description of a Crusher embody# ing the invention in its preferred form will now be given, and the features forming the invention then specifically pointed outin the claims.

In the accompanying drawings, which show agyratory crusher of a Well known.

is a vera horizontal section on. the line 2 of Fig. 1. Fig. l3 is a vertical section on the line 3 of Fig. 2. Fig. 4 is a detail showingamodification of the dust excluding ring.

, Referring to said drawings, A is the casat the bottom below the driving mechanism by the cap C. The crushing shaft F carry-y ing the crushing head G is shown as suspended in the spider B by the well known suspension of the McCully patents, but may be supported otherwise within the invention. The counter shaft I-I is mounted in the counter shaft bearing I, and is shown as driven by the usual pulley K, this counter shaft H carryingthe usual bevel gear L engaging driving gear `M to drive the shaftv through the eccentric N.

The general construction andoperation of the crusherv shown, except as pointed out hereafter, is the same as of the well known McCully crushers; i

ing or shell carrying the spider B and closed v Referring now to the specific construction i.

of the crusherffor embodiment of the present invention, .the usual diaphragm .between the crushing head G and the, driving gear and eccentric, by which the crushed material is delivered above the eccentric and the driving mechanism covered and protected, is omitted, and the eccentric hub O and'eccentric N are placed directly below the crushing head with the driving gear `M at the bottom ofthe eccentric. This eccentric hub O is preferably formed integral with the casing and withi the walll P forming a chamber inclos ing the gears L.M, so as to cover and protect the driving-criechamsm.` On the coun-1 ter shaft side,` thezfwall of-the chamber iii-" L connectsand on theLf closing the counter` shaft gear the 'eccentric hub'to the casing,

opposite side are formed *Harms l0 extending-f from the casing lto wall P, preferably being rounded on the upper side for free passage of the crushed material. The crushed material is delivered downward between the gear chamber and casing to the bottom of the Crusher, and, as shown, delivery chute R is attached to.the bottom df the crusher to viously being possible to arrange this chute r the bottom of the 'crusher, the eccentric N running on the bearing ring 11 on this cap,;

, direct the crushed material as desired, it obi below the gear isclosed by cap C bolted oli-- iio The machine isv preferably lubricated by rease, which is introduced through the cap below the shaft M through grease pipe 12 on cap C, so that the lubricant passes first to the eccentric bearing surfaces, and then to the other Amoving parts of ,the crusher through the grease holes 13.

On top of the eccentric hub O is a seat 1 which is preferably sphericalwith its surface struck from the center on which the shaft gyrates in the spider P, on which runs a dust excluding ring 14, moving with the head G and having a correspondlng spher-l ical surface engaging the spherical seat 1 on the eccentric hub O. This ring 14 is shown in' Fig. 1 as formed separatelyy from the crushing head G, so that thef. crushing head and shaft may be raised to adjust the crushing head without interfering with the closure formed by the ring 14 at the top ofthe eccentric hub `O. Where vertical adjustment of the head is not required, this ring 14-may be formed integral with the crushing head or may be formed and permanently attached to the head in any suitable manner. In Fig. 4 the ring 14 is shown as formed integral with theI crushing head, being preferably faced with Babbitt or other similar metal 4 on its engaging surfaces. VThe chief advantage of the inclined surface is that the vertical rubbing action and tipping of the ring as the head gyrates which would result if the engaging surfaces were fiat, are avoided, the best results being se# cured -with the spherical surfaces-- It will bey seen that in the crusher shown there is no opening through which the grease or other lubricant forced in may es.- cape except at the top of the hub around the ring 14, and around the counter shaft I-I, and these are the only openings through 'which dust could enter the driving' mechanism.` The grease or other lubricant will be forced out through these openings, closing them absolutely against the entry of dust, so that the crusher shown is dust proof as y to the driving mechanism.'

'shaft H and its gear L, and the return of the shaft and gear lto proper position being assured by the return of the counter shaft .bearing I. The driving gear M and eccentric also are readily removed and replaced through the opening at the bottom of the. crusher,whenl the cap Gis removed.

In this construction of crusher, it has been usual to piovide a door in the casing, for

examination of the meshing of the gears and their condition, room for such door being provided by the considerable depth of thecasing below the crushing head and diaphragm. In the present short frame crusher, provision for examination of the gears is made by two openings 2, 3 into the gear casing below the counter shaft, these openings bein@` so 'located that by inserting a lighted candle or other light through the opening 2', the meshing of the gears may be examinedy through opening 3 which is in line with\the mesh line of the gears.

It will be seen that the main shaft of this Crusher is very short, as compared with the shafts of the gyratory crushers now in use, so that the tendency of the shaft to deflect under heavy strains is largely reduced. -This construction materially strengthens the'machine, as the shaft in previous crushers has been one of the weakest parts, and' a stronger shaft 'of smaller diameter is made possible Aby the present invention. The mounting ot'f the eccentric close to the head also secures a very rigid construction. The shortening not only reduces largely the height and much easier to dismantle the machine on account of the greatly reduced weight. `The integral construction of the casing and gear chambers and eccentric hub, and the bracing and support of the eccentric hub and gear chambers by the arms 10 also enables the machine to be made lighter for equal strength.

It is to be understood that the invention is 'not to be limited to the' particular 'construction or arrangement of the devices shown as embodying the invention, but modifications may be made therein within the scope of the claims while retaining the invention defined by the claims.

The crusher shown is covered by the broader claims of application Serial No. 510,688 filed August 2, 1909, and all novel features of construction shown but not tion Serial'No. 510,688.

What is claimed is 1. In a gyratory crusher, the combination with a crusher shaft and orushin head ing an eccentric directly below the head, an. eccentric hub and ear inclosing chamber below the head, anan outer casing providing an annular delivery space `extending to the bottom of the Crusher about the gear terial is delivered .below the driving mechanism. i

2.. In a gyratory crusher the combination with a Crusher shaft and crushing ucluding an eccentric and gearin for driving the eccentric, of an eccentric hub beclaimed herein are claimed in said applicaof the shaft and lower portion of the casing weight of the machine, but also makesit l thereon, ofyshaft driving mechanism lncludv chamber through which the 'crushed ma- .I'

head thereon, and shaft driving mechanism inlow the crushing head, a dust excluding ring engaging the hub and closing the space b etween the hub and ,crushing head, a gear nclosing chamber, and an outer casing pro-l viding an annular delivery space extending to the bottom of the crusher about the gear chamber through which Xthe crushed material isdelivered below the driving mechanism. v v 3. In a gyratory crusher, the combination with a crusher shaft and crushing headu thereon, of an eccentric below the head, a driving gear at the bottom of the eccentric, a counter-shaft gear engaging the top of the driving gear, and an eccentric hub surrounding t-he eccentric and formed integrally with the casing and with a chamber arranged to inclose the gearing, thecasing and chamber being formed to provide an annular delivery space extending to the bottom of the crusher about the gear chamber through which the crushed material is delivered below the driving mechanism.

4. In a gyratory Crusher, the combination with the Crusher shaft and crushing head thereon, of shaft driving mechanism below the head, a chamber inclosing the droiving` `tershaft gear L above the gear, gear chamber I integral with the casing and separated ',fromthe casing to form an annular deliv- Aery space extending vto the `bottom of the Crusher about the' gear chamber through which the crushed material is delivered below the driving mechanism and a cap C closing the bottom of the chamber within said annular delivery space.

In testimony whereof, we have hereunto set our hands` in the presence of two sub scribin'g witnesses.

ARTHUR NIEDERMEYER. RICHARD BERNHARD. Witnesses:

L. F. SNYDER, THOMAS W. WEARE. 

